Smart OBIORA | Professor (Full) | B. Sc., M.Sc., Ph.D.
Smart Obiora currently works at the Department of Geology, University of Nigeria. Smart does research in Petrology, Mineralogy and Geology. His current projects include: (1) ''Assessment of ...
Heavy metals, radionuclides activity and mineralogy of soil …
The Ife-Ilesha schist belt of the Nigerian Basement Complex is renowned for artisanal gold mining activities owing to the occurrence of gold-bearing eluvial deposits within and around the belt. However, gold mining operations in Ile-Ijesha axis are carried out haphazardly without consideration of probable health risks that might be posed to the miners and local …
Heavy metals and health risk assessment of arable soils
For example, in Nigeria, in the mining region of Enyigba, high concentrations of Cd, Cr, Pb, and Zn were found in tubers, vegetables, and fruits such as lemon (Citrus limon) and pumpkin (Cucurbita ...
Mesozoic Pb-Zn and related mineralization in the
Download scientific diagram | Mesozoic Pb-Zn and related mineralization in the Nigerian Benue Trough, after (Burke et al. 1972) from publication: Lead Reservoirs and Metallization in Nigeria ...
Contamination, ecological, and human health risks of heavy …
In Nigeria, artisanal mining has become a serious issue. In the Nigerian mining region of Arufu Pb–Zn–F, this study assessed the level of pollution, ecological hazards, and health risks related to the presence of metals in the water.
(PDF) Fracture Orientation Significance in the Study of Pb-Zn
For example: Aplite and quartz deposit in Igarra schist belt of SW basement complex of Nigeria trends in N – S and NW – SE directions and moderately/steeply dipping in E – W and N – S direction [84], Broken Hill Pb-Zn-Ag Deposit of New South Wales, Australia, majorly controlled by fold [80], Tungsten Deposits in Central Rwanda ...
Review of the Basement Geology and Mineral Belts of …
Au, Cr-serpentinite, Sn-Ta belts = Pan African; Sn-Nb, Pb-Zn belts = Mesozoic to Early Cenozoic. 3.1 Au Schist Belts Areas of gold mineralisation in Nigeria are associated with the regional NE …
(PDF) CHARACTERISATION OF GOLD-ASSOCIATED BASE …
The geochemical analysis results indicated that the concentrations of these elements copper (Cu), nickel (Ni), lead (pb), and zinc (Zn) are substantial in the majority of the locations when ...
Physicochemical Studies for Risk Identification, …
environment and assessed health hazards due to mining at gold, Pb-Zn-F, coal, granite, sil- ica/sand, Pb, Fe ore, and barite mines [14–16,20–33]. However, scientific information about
Petrogenetic characterization of pegmatites and their host
The Nigeria basement complex is part of the Upper Proterozoic Pan-African mobile belt, located between the West African and Congo Cratons and south of the Tuareg Shield …
MISSISSIPPI VALLEY-TYPE PB-ZN DEPOSITS (MODELS …
Tri-State district, Okla., Mo., and Kans. Modern mining techniques return most waste rock to underground workings; surface tailings and mineral processing facilities pose the most serious environmental concerns. Water quality: Because ore is dominantly carbonate-rock hosted, local rock buffers potential acid mine and tailings water.
Heavy metals and health risk assessment of arable soils and …
The result of the MTF indicated higher values Cd, Ni, Pb and Zn and higher for Cu when compared with those reported by Khan et al. (2010) around volcanic and meta-sedimentary rock province, northern Pakistan, similarly, the result also shows lower values for Cr, Co, Ni, Pb, Mn and Zn and higher for Cd and Cu when compared with those reported by ...
(PDF) Tin Mineralisation in Nigeria: A Review
Nigeria is endowed with vast but largely untapped solid mineral resources including tin ores (cassiterite and stannite). Tin, which is one of the oldest metals known to man, is invaluable in a wide variety of uses due to its intrinsic …
Environment of ore formation and anchizonal metamorphism in Pb
The Benue Trough of Nigeria is an intracratonic rift basin hosting several vein-type base metal deposits. The Akiri Cu ± (Ag) deposit represents a distinct sub-class of sediment-hosted Pb-Zn-Cu ...
Origin of sediment-hosted Pb-Zn mineralization in the …
Studies of sediment-hosted Pb-Zn ore deposits have resulted in many attempts at classification (e.g., descriptive: either deposit morphology or host-rock type, or genetic: syngenetic versus epigenetic). No single classification scheme exists that allows for unequivocal subdivision of all sediment-host Pb-Zn deposits.
Genesis and age of Pb−Zn mineralization from the Ningi …
The Nigerian Mesozoic anorogenic complexes cover an area 400 km and 160 km wide and intruded quartzofeldspatic Precambrian basement rocks (Fig. 1 a-b).Structural and …
Heavy metals and health risk assessment of arable soils and …
This study determined the heavy metals concentration in arable soils and associated food crops around the Pb–Zn mines in Enyigba, Nigeria, and metal transfer factors were calculated. Air-dried samples of the soils and food crops were analyzed for 8 known nutritional and toxic heavy metals by Inductively Coupled Plasma - Mass Spectrometer (ICP …
Origin of lead-zinc mineralization in the southern Benue …
The techniques of aeromagnetic data analysis were employed to elucidate depth to magnetic basement sources, lead-zinc (pb-zn) mineralisation and heat flow in parts of Southern Benue Trough.
Mesozoic magmatism and timing of epigenetic Pb-Zn-Ag …
Mesozoic magmatism and timing of epigenetic Pb-Zn-Ag mineralization in the western Fortymile mining district, east-central Alaska: Zircon U-Pb geochronology, whole-rock geochemistry, and Pb isotopes: Series title: Geosphere: DOI: 10.1130/GES01092.1: Volume: 11: Issue: 3: Year Published: 2015: Language: English: Publisher: Geological Society of ...
Nuna supercontinent assembly linked to carbon cycling in …
Monazite U–Pb dates (weighted-mean 207 Pb/ 206 Pb age 1,782 ± 23 Ma and 1,762 ± 36 Ma, Supplementary Fig. 19 of Supplementary Section 2-5.1; 1,813 ± 11 Ma and …
Pb-Zn-Ba deposits in the Nigerian Benue Trough: A synthesis …
1. Introduction. Sediment-hosted Pb-Zn (±Ba ± Cu ± F ± Ag) deposits contain the major global resources of lead and zinc and contribute significantly to the world's production of …
Temporal variations of heavy metals in sediment, soil and …
Concentrations and distribution trends of selected heavy metals (Fe, Mn, Cu, Pb, Zn, Cd, Cr, Ni and As) in sediment samples, soil and dust particulates across the rock quarrying districts of the Precambrian basement Oban …
Trace elements and health: an environmental risk in …
high levels of these toxic elements such as Pb, Zn, Cu, Cd, As, Hg, V, Co, Cr etc have been reported in most ... iodine is restricted to the crystalline Basement rock areas. ... Galena Mining at ...
Two-episode mineralization in the Haerdaban Pb–Zn
The study area was within the Sayram microcontinent, which forms the northwestern margin of the KYB (Fig. 1 c).This region exposes a discontinuous stratigraphy from the Precambrian to …
Assessment of heavy metal contamination in soils around lead (Pb…
Mining activities have been undertaken for over 95 years in Enyigba area of southeastern Nigeria. In this area, thirty-six (36) trace metals including those that are essential for plant and animal nutrition have been analyzed from forty-nine (49) soil samples that were collected from three Pb-Zn mines. The aim of the analysis is to assess the level of …
Model of Pb/Zn mineralization genesis in the Cretaceous …
Field evidence support syn-folding of ore bearing structures in the Akiri ore field (Fig. 6b). Similar to other Pb-Zn and Cu deposits in the Benue trough, the ore bearing structures in the Akiri deposit are closely associated with brine pools and an anticlinal structure (Andrew-Oha et al., 2017; Ezepue, 1984; Maurin and Benkhelil, 1990; Offodile, 1980).
Contamination, ecological, and human health risks of heavy …
In Nigeria, artisanal mining has become a serious issue. In the Nigerian mining region of Arufu Pb-Zn-F, this study assessed the level of pollution, ecological hazards, and health risks related to the presence of metals in the water. In the dry and rainy seasons, 36 …
(PDF) Assessment of Environmental Geochemistry of Lead-Zinc Mining …
Lead-zinc (Pb-Zn) sulphide mining activities in the Ishiagu area in the lower Benue T rough, southeastern Nigeria have a potential significant impact on the quality of soil and water resources and ...
Genesis and age of Pb−Zn mineralization from the Ningi …
The Nigerian Mesozoic anorogenic complexes cover an area 400 km and 160 km wide and intruded quartzofeldspatic Precambrian basement rocks (Fig. 1 a-b).Structural and geochronological studies (Rahaman et al., 1984) have shown that the emplacement of the Mesozoic anorogenic ring complexes of Nigeria was primarily controlled by N-S trending …
Environmental Impact from Lead-Zinc Mining and Lead
Mean values of Cu, Fe, Pb and Zn obtained in this study exceeded those obtained by Sanusi, Hassan, and Kura (2017) in soil samples in a Pb-Zn mining area in Yelu Alkaleri Bauchi state Nigeria.